66939119 has 8 divisors (see below), whose sum is σ = 72322992. Its totient is φ = 61588800.

The previous prime is 66939107. The next prime is 66939121. The reversal of 66939119 is 91193966.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66939119 - 2²⁰ = 65890543 is a prime.

It is a super-2 number, since 2×66939119² = 8961691304992322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66939119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66939419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4157 + ... + 12294.

It is an arithmetic number, because the mean of its divisors is an integer number (9040374).

Almost surely, 2^66939119 is an apocalyptic number.

66939119 is a deficient number, since it is larger than the sum of its proper divisors (5383873).

66939119 is a wasteful number, since it uses less digits than its factorization.

66939119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16777.

The product of its digits is 78732, while the sum is 44.

The square root of 66939119 is about 8181.6330277030. The cubic root of 66939119 is about 406.0317523113.

The spelling of 66939119 in words is "sixty-six million, nine hundred thirty-nine thousand, one hundred nineteen".